CN202840822U - Improved structure for air cooler of pump storage group generator - Google Patents

Improved structure for air cooler of pump storage group generator Download PDF

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Publication number
CN202840822U
CN202840822U CN 201220565837 CN201220565837U CN202840822U CN 202840822 U CN202840822 U CN 202840822U CN 201220565837 CN201220565837 CN 201220565837 CN 201220565837 U CN201220565837 U CN 201220565837U CN 202840822 U CN202840822 U CN 202840822U
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CN
China
Prior art keywords
lid
water
cooling
air cooler
aerial cooler
Prior art date
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Expired - Lifetime
Application number
CN 201220565837
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Chinese (zh)
Inventor
樊玉林
王春亭
高占杰
施美霖
潘春强
郭新杰
李江涛
刘伟
胡新文
张光宇
张毅
付金艳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Shisanling Energy Storage Plant Of State Grid Xinyuan Co ltd
State Grid Corp of China SGCC
State Grid Xinyuan Co Ltd
Original Assignee
Beijing Ming Tombs Storage Power Station Of North China Grid Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Ming Tombs Storage Power Station Of North China Grid Co Ltd filed Critical Beijing Ming Tombs Storage Power Station Of North China Grid Co Ltd
Priority to CN 201220565837 priority Critical patent/CN202840822U/en
Application granted granted Critical
Publication of CN202840822U publication Critical patent/CN202840822U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses an improved structure for an air cooler of a pump storage group generator. The improved structure is characterized in that firstly, the air cooler is provided with three water guide chambers instead of two water guide chambers, and a U-shaped cooling water channel of the air cooler is changed to be a W-shaped channel; and in the air inlet direction of the air cooler, the replacement of cooling water pipes and sealing materials is added, the heat dissipation effect is improved, the heat transmission allowance of the air cooler is increased, and the heat exchange efficiency of the air cooler is improved, so that a unit operation requirement is met, and the improved structure solves the problems that the cooling effect of the aged air cooler is lowered and the purchase cycle of import spare parts is long, the purchase cost and maintenance cost are high and the like, and realizes the comprehensive lifting of the security level and benefit level of hydraulic power plant equipment.

Description

The improvement structure of pumped storage set generator aerial cooler
Technical field
The utility model belongs to power generator air cooler equipment scope, particularly a kind of improvement structure of pumped storage set generator aerial cooler.Specifically for the maintenance transformation after the aging rear cooling effect decline of inlet generating machine air cooler of pumped storage unit, improve cooling effect, and relate to the problems such as import spare parts purchasing cycle length, purchase cost and maintenance cost height.
Background technology
Ming Tombs, Beijing accumulation of energy power plant be State Grid Xinyuan Co., Ltd. directly under power plant, 200,000 kilowatts of single-machine capacities, totally 4 units, every unit is installed 8 aerial coolers, up to now operation has reached 14 years.Aerial cooler is the ribbed pipe surface heat exchanger, is used for taking away the waste heat that generator produces when operation, and cooling water in the pipe is flow through in the waste heat transmission, reaches the effect of cooling.During the unit maintenance aerial cooler is carried out pressure test, find that aerial cooler internal copper pipeline has the part seepage defect, confirm on inspection, wherein 3# aerial cooler cooling water pipe seepage is 15%, carry out shutoff after the cracking seepage of copper pipe road, the aerial cooler heat-exchange capacity descends, and causes generator cold-hot wind temperature drift, affects the reliability service of generator.According to DL/T 817 1 2002 vertical hydrogenerator service technique rules regulations, if copper pipe itself sew, but two block with drift ping, but the radical that stops up copper pipe must not surpass 10% of total radical, otherwise should more renew cooler.The problems such as the air cooler of present operation is made by Austria Vienna SIROCCO company, exists price high as ordering spare part from former factory, and delivery cycle is long, therefore being necessary sets up the project carries out multinomial Home-produced Reconstruction to the import air cooler.
The utility model content
The purpose of this utility model is for prior art Air cooler internal copper pipeline the part seepage defect to be arranged, carry out shutoff after the cracking seepage of copper pipe road, the aerial cooler heat-exchange capacity descends, cause generator cold-hot wind temperature drift, affect generator reliability service deficiency and a kind of improvement structure of pumped storage set generator aerial cooler is provided, it is characterized in that, on aerial cooler, increase a upper water cavity dividing plate in the water end (W.E.) lid, make the water guide chamber make 3 into by 2, increase a lower water cavity dividing plate in the lower water end (W.E.) lid, make the cooling-water duct of aerial cooler form W shape passage by single U-shaped passage;
The improvement structure of described aerial cooler is to be welded into support body by stator channel-section steel 4, fixes respectively water end (W.E.) lid 15 and lower water end (W.E.) lid 13 at the support body two ends by bolt 6, and upper water end (W.E.) lid 15 and lower water end (W.E.) lid 13 use housing screw 16 to compress simultaneously; In support body two sides fixing cooling fins 2, cooling water pipe 5 is arranged in the support body, and cooling water pipe 5 two-port are respectively facing to the upper water guide chamber 8 in the upper water end (W.E.) lid and the lower water guide chamber 11 in the lower water end (W.E.) lid, at two electric bars 3 of compensation of support body end face welding; Lower water end (W.E.) covers the fixing lower water cavity dividing plate 12 in 13 interior middle parts, and the cooling water pipe 5 that stretches into lower water guide chamber 11 is divided into two parts; Cover two upper water cavity dividing plates 10 of 15 interior welding at upper water end (W.E.), upper water guide chamber 8 is divided into three parts, weld respectively cooling water intake 9 and cooling water outlet 7 in two end portions, and be welded to connect flange 14 at cooling water intake 9 and cooling water outlet 7; Rubber seal 1 sealing is arranged between the contact-making surface of upper water end (W.E.) lid 15, lower water end (W.E.) lid 13, upper water cavity dividing plate 10 and lower water cavity dividing plate 12 and support body; Make to be divided into two-part lower water guide chamber 11 with intake-outlet connection in two parts, in like manner, upper water guide chamber 8 mid portions are connected the intake-outlet in this part, form W shape cooling-water duct in the aerial cooler thereby make.
The area of two end portions is identical in described three parts, and be the mid portion area area 1/2nd.
Described cooling water pipe increases to 5 rows more than 160 by 4 130 of rows.
Described fin is made by copper sheet.
The invention has the beneficial effects as follows that aerial cooler water guide chamber seal form is rubber seal, increase sealing effectiveness, raising seals useful life; Effect from through improved unit actual motion effectively reduces the hot and cold air temperature of generator, has improved the operating efficiency of cooler, has guaranteed the generator operation fail safe, reduces buying and maintenance cost.The technology of taking can be generalized to other hydroelectric plants, has preferably economic benefit and promotional value.
Description of drawings
Fig. 1 is the aerial cooler structural representation.
Fig. 2 is cooling water pipe arrangement architecture schematic diagram in the aerial cooler.
Fig. 3 is water end (W.E.) lid structural representation on the aerial cooler.
Fig. 4 is water end (W.E.) lid structural representation under the aerial cooler.
Embodiment
The utility model provides a kind of improvement structure of pumped storage set generator aerial cooler, is explained below in conjunction with accompanying drawing.
Figure 1 shows that the aerial cooler structural representation.Among the figure, be welded into support body by stator channel-section steel 4, fix respectively water end (W.E.) lid 15 and lower water end (W.E.) lid 13 at the support body two ends by bolt 6, upper water end (W.E.) lid 15 and 13 whiles 5 of lower water end (W.E.) lid housing screws 16 compress; In support body two sides fixing cooling fins 2, cooling water pipe 5 is arranged in the support body, and cooling water pipe 5 two-port are respectively facing to the upper water guide chamber 8 in the upper water end (W.E.) lid and the lower water guide chamber 11 in the lower water end (W.E.) lid, at two electric bars 3 of compensation of support body end face welding; Lower water end (W.E.) covers the fixing lower water cavity dividing plate 12 in 13 interior middle parts, and the cooling water pipe 5 that stretches into lower water guide chamber 11 is divided into two parts; Cover two upper water cavity dividing plates 10 of 15 interior welding at upper water end (W.E.), upper water guide chamber 8 is divided into three parts, weld respectively cooling water intake 9 and cooling water outlet 7 in two end portions, and be welded to connect flange 14 at cooling water intake 9 and cooling water outlet 7; The area of two end portions is identical in described three parts, and be the mid portion area area 1/2nd; The cooling water pipe 5 of mid portion is water outlet near half of cooling water intake 9, and half of close cooling water outlet 7 is water inlet; Rubber seal 1 sealing is arranged between the contact-making surface of upper water end (W.E.) lid 15, lower water end (W.E.) lid 13, upper water cavity dividing plate 10 and lower water cavity dividing plate 12 and support body; Make and be divided into two-part lower water guide chamber 11 with intake-outlet connection in two parts, in like manner, upper water guide chamber 8 mid portions are connected the intake-outlet in this part, thereby the cooling water that makes cooling water pipe 5 in the aerial cooler forms W shape and flows to, compare with the single U-shaped flow direction of original air cooler, increase the heat transfer surplus of radiating effect and cooler, satisfy the unit operation requirement.
Figure 2 shows that cooling water pipe arrangement architecture schematic diagram in the aerial cooler, the upper water guide chamber 8 that is divided into three parts, 8.1 cooling water pipe flows to half water guide chamber 11, lower water guide chamber with the cooling water of cooling water intake 9 in the part, the centre is divided into two parts, 8.2 cooling water pipe is the water outlet of half water guide chamber 11, lower water guide chamber in the part, 8.3 cooling water pipe returns the water outlet of half water guide chamber 11, lower water guide chamber second half water guide chamber of lower water guide chamber 11 in the part, second half water guide chamber is returned the cooling water that returns in 8.4 parts of upper water guide chamber 8 (shown in Fig. 4 water (flow) direction), from cooling water outlet 7 by cooling water pipe in 8.4 parts of upper water guide chamber 8 again.
Embodiment
1. increase by row's cooling water pipe in aerial cooler air inlet/outlet direction, cooling fin changes copper sheet into by aluminium flake, make the cooler leaving air temp reduce 1-1.5 ℃, each temperature of motor also reduces 1-1.5 ℃, after cooler increases by row's cooling water pipe, a total of tubes is increased to 163 by 130, and the area that contacts with air increases to 393 ㎡ by 314 ㎡, and the cooler heat load is down to 0.057 kw/ ㎡ ℃ by 0.0715kw/ ㎡ ℃.Therefore obviously increase radiating effect, increased the heat radiation surplus, strengthened the cooling capacity of cooler.
2. air cooling water chamber seal form is replaced by Φ 5mm rubber seal by asbestos seal, be convenient to on-the-spot the installation behind the structure of modification and change, and the life-span extends to the 3-5 year by the 1 original year, sealing prolongation in useful life, significant sealing affection.
3. 2mm is widened on four limits of stainless steel hydroecium at air cooler two ends, is convenient to install sealing;
4. the stainless steel upper tank at air cooler two ends turnover water cavity dividing plate is thickeied to 10mm, guarantees its sealing;
5. lower header is selected stainless steel material processing on the stainless steel at air cooler two ends;
6. the stainless steel hydroecium at air cooler two ends carries out preservative treatment to sealing contact surface, improves corrosion resistance, reduces the defective that corrosion causes;
7. air cooler supported on both sides channel-section steel changes galvanized steel into, is convenient to attractive in appearance and heat radiation;
8. because the cooler weight after improving is increased to 850kg, increase the compensation filler strip between every cooler and stator channel-section steel, 2 of the wide 30x of long 2220x thick (3mm) strengthen closing intensity;
9., the stainless steel hydroecium at air cooler two ends carries out blasting treatment, the bright and clean smooth effect of assurance hydroecium outward appearance;
10, the price of the every case air cooler before the transformation is 320,000 yuan, and the price of improved every case air cooler is 9.248 ten thousand yuan, and 8 casees air coolers of every unit, maintenance cost reduce by 20,000/year on year-on-year basis, and every unit is saved 184.016 ten thousand yuan.
11. this project 4# B of Unit level maintenance is implemented, generator cold-hot wind temperature obviously reduces after transforming, the stator hot blast in the extreme high temperature in summer situation, than the same period in former years 70 ℃ of maximum temperatures be reduced to 68 ℃, successful has ensured unit safety stable operation.

Claims (5)

1. the improvement structure of a pumped storage set generator aerial cooler, it is characterized in that, on aerial cooler, increase a upper water cavity dividing plate in the water end (W.E.) lid, make the water guide chamber make 3 into by 2, increase a lower water cavity dividing plate in the lower water end (W.E.) lid, make the cooling-water duct of aerial cooler form W shape passage by single U-shaped passage.
2. the improvement structure of described a kind of pumped storage set generator aerial cooler according to claim 1, it is characterized in that, the improvement structure of described aerial cooler is to be welded into support body by stator channel-section steel (4), fix respectively upper water end (W.E.) lid (15) and lower water end (W.E.) lid (13) at the support body two ends by bolt (6), upper water end (W.E.) lid (15) and lower water end (W.E.) cover (13) uses housing screw (16) to compress simultaneously; In support body two sides fixing cooling fins (2), cooling water pipe (5) is arranged in the support body, cooling water pipe (5) two-port is respectively facing to the upper water guide chamber (8) in the upper water end (W.E.) lid and the lower water guide chamber (11) in the lower water end (W.E.) lid, at two compensation of support body end face welding electric bar (3); The fixing lower water cavity dividing plate (12) in middle part in the lower water end (W.E.) lid (13), the cooling water pipe (5) that will stretch into lower water guide chamber (11) is divided into two parts; Welding two upper water cavity dividing plates (10) in upper water end (W.E.) lid (15), upper water guide chamber (8) is divided into three parts, weld respectively cooling water intake (9) and cooling water outlet (7) in two end portions, and be welded to connect flange (14) at cooling water intake (9) and cooling water outlet (7); Between the contact-making surface of upper water end (W.E.) lid (15), lower water end (W.E.) lid (13), upper water cavity dividing plate (10) and lower water cavity dividing plate (12) and support body, rubber seal (1) sealing is arranged; Make to be divided into two-part lower water guide chamber (11) with intake-outlet connection in two parts, in like manner, upper water guide chamber (8) mid portion is connected the intake-outlet in this part, forms W shape cooling-water duct in the aerial cooler thereby make.
3. the improvement structure of described a kind of pumped storage set generator aerial cooler according to claim 2 is characterized in that, the area of two end portions is identical in described three parts, and be the mid portion area area 1/2nd.
4. the improvement structure of described a kind of pumped storage set generator aerial cooler according to claim 2 is characterized in that, described cooling water pipe increases to 5 rows more than 160 by 4 130 of rows.
5. the improvement structure of described a kind of pumped storage set generator aerial cooler according to claim 2 is characterized in that, described fin is made by copper sheet.
CN 201220565837 2012-10-30 2012-10-30 Improved structure for air cooler of pump storage group generator Expired - Lifetime CN202840822U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220565837 CN202840822U (en) 2012-10-30 2012-10-30 Improved structure for air cooler of pump storage group generator

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Application Number Priority Date Filing Date Title
CN 201220565837 CN202840822U (en) 2012-10-30 2012-10-30 Improved structure for air cooler of pump storage group generator

Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102969836A (en) * 2012-10-30 2013-03-13 华北电网有限公司北京十三陵蓄能电厂 Method for improving cooling effect of air cooler of generator of pump storage group

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102969836A (en) * 2012-10-30 2013-03-13 华北电网有限公司北京十三陵蓄能电厂 Method for improving cooling effect of air cooler of generator of pump storage group

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C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: STATE GRID XINYUAN CO., LTD. STATE GRID XINYUAN HO

Effective date: 20130502

Owner name: STATE ELECTRIC NET CROP.

Free format text: FORMER OWNER: BEIJING MING TOMBS STORAGE POWER PLANT OF NCGC

Effective date: 20130502

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 102200 CHANGPING, BEIJING TO: 100000 DONGCHENG, BEIJING

TR01 Transfer of patent right

Effective date of registration: 20130502

Address after: 100000 Beijing West Chang'an Avenue No. 86

Patentee after: State Grid Corporation of China

Patentee after: STATE GRID XINYUAN Co.,Ltd.

Patentee after: BEIJING SHISANLING ENERGY STORAGE PLANT OF STATE GRID XINYUAN CO.,LTD.

Address before: 102200 Beijing city Changping District water village in Ming Dynasty Tombs of Beijing pumped storage power station

Patentee before: North China Grid Co.,Ltd. Beijing Shisanling Storage Power Plant

CX01 Expiry of patent term

Granted publication date: 20130327

CX01 Expiry of patent term